Water Pump

water pump or the truck itself? my 3.4 has 153k and i still havnt changed the belts or pump but thats changing as of next week along with some fresh oil while im at it

 

well im changing mine just in case

 

exactly not a hard job to do but might as well kill 2 birds with 1 stone

 

mine is at 123 and the previous owner said he didnt change the chain or pump, what are the symptoms of a dying pump? or does it just catastrophically die all at once?

 

i have heard some people say going down the road the motor would cause less noise. i personally have never had one fail on me. i guess it could go slowly or all at once not sure.

 

Usually they leak first.

I had one that was noisy and made a knocking sound once. That wasn't a Toyota though.

 

The timing chain in the 2.7 never has to be changed.

That is why chains are far superior to belts in every way.

 

i call bs its a chain...made out of metal...which stretches.

 

they're designed to last the life of the engine. Sure at around 350 - 400k it might be stretched a bit by that time you generally need to open the engine up anyway.

 

Theoretically, YES they stretch.... but not enough to cause any sort of timing issues or breakage. Chains will have some sort of 'idler' to keep them at the proper 'tension'. If a chain is properly tensioned, it will last a very very long time with minimal stretch.

If you abuse the crap out of your truck and race the engine often - well, that's another story You might have more problems than just the timing chain.